Portable rechargeable battery pack



FIG. 1 is a front perspective view of a portable, rechargeable batterypack with its parts in an alternative position showing my new design;

FIG. 2 is a front elevational view of a portable rechargeable batterypack with its parts in the storage position;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The ornamental design for a portable, rechargeable battery pack, asshown and described.